Johns, T. (1994). Perfect customer care: All you need to get it right first time. Arrow, Random House.
Lua i Stíl Chicago (17ú heag.)Johns, Ted. Perfect Customer Care: All You Need to Get It Right First Time. London : UK: Arrow, Random House, 1994.
Lua MLA (8ú heag.)Johns, Ted. Perfect Customer Care: All You Need to Get It Right First Time. Arrow, Random House, 1994.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.